恒星口语讲堂:"鼓励"用英语怎么说?

a. — I'm afraid I can't succeed. 恐怕我难以成功。

　— Come on! 别灰心。

b. — I'll not learn English any longer. I can't remember all these words. 我不想学英语了，我记不住这么多单词。

　— Come on! 别灰心。